Ligustrazine Injection for Chronic Pulmonary Heart Disease: A Systematic Review and Meta-Analysis

<table>Comparison of ligustrazine hydrochloride injection + conventional treatment versus conventional treatment. Lack of improvement in heart failure (NYHA class improved &lt;I class or worsening of heart failure). M-H: Mantel-Haenszel formula.</table>

Evidence-Based Complementary and Alternative Medicine

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Figure 2

Figure 2: Ligustrazine Injection for Chronic Pulmonary Heart Disease: A Systematic Review and Meta-Analysis 